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Summary
Physical Characteristics
Nuphar polysepala is a PERENNIAL growing to 1.8 m (6ft).
See above for USDA hardiness. It is hardy to UK zone 4. It is in flower from July to August. The species is hermaphrodite (has both male and female organs) and is pollinated by Flies, beetles.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It can grow in water.
UK Hardiness Map
US Hardiness Map
Synonyms
N. lutea polysepala. (Engelm.)E.O.Beal.
Plant Habitats
Pond;
Edible Uses
Edible Parts: Root Seed
Edible Uses:
Root - raw or cooked[2, 161]. Boiled or baked[2, 85, 94]. The root can also be dried and ground into a flour[85]. The rather strong taste can be removed by soaking the root in water prior to use[85]. The N. American Indians used the roots in times of famine[212]. Seed - raw or cooked[2, 46, 61, 101, 161]. The fairly large seed can be dried and ground into a powder and then be used for making porridge or mixed with other flours for making bread[94, 172]. When roasted it resembles popcorn in flavour[212].
References More on Edible Uses
Medicinal Uses
Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.
Analgesic Haemostatic Poultice
The root is analgesic and antihaemorrhagic[257]. A decoction is taken in the treatment of pain in any part of the body, and for lung haemorrhages, TB etc[257]. A poultice made from the root is used in the treatment of any pain, rheumatic joints, sores etc[257].
References More on Medicinal Uses
Other Uses
References More on Other Uses
Cultivation details
A water plant requiring a rich soil and a sunny position[1, 56]. It is best grown in still water up to 75cm deep but it also tolerates slow moving water[200]. Succeeds in light shade[200]. Plants are hardy to about -20°c[187].
References Carbon Farming Information and Carbon Sequestration Information
Temperature Converter
Type a value in the Celsius field to convert the value to Fahrenheit:
Fahrenheit:
Plant Propagation
Seed - sow as soon as it is ripe in a greenhouse in pots submerged under 25mm of water. Prick out into individual pots as soon as the first true leaf appears and grow them on in water in a greenhouse for at least two years before planting them out in late spring. The seed is collected by wrapping the developing seed head in a muslin bag to avoid the seed being lost. Harvest it 10 days after it sinks below the soil surface or as soon as it reappears[200]. Division in May. Each portion must have at least one eye. Submerge in pots in shallow water until established[56].
Other Names
If available other names are mentioned here
Native Range
NORTHERN AMERICA: Canada (Northwest Territories (west), Yukon, British Columbia), United States (Alaska, Colorado (w. & c.), Idaho, Montana (w. & s.), Oregon, Washington, Wyoming, New Mexico (north), Arizona (Coconino & Navajo Cos.), California (north & central), Nevada (west), Utah (northeast))
Weed Potential
Right plant wrong place. We are currently updating this section.
Please note that a plant may be invasive in one area but may not
in your area so it's worth checking.
Conservation Status
IUCN Red List of Threatened Plants Status :
IUCN Red List
Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.
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Expert comment
Author
Engelm.
Botanical References
60200
Links / References
For a list of references used on this page please go here
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Subject : Nuphar polysepala
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